Abstract
To safely move from its fire accident site a hydrogen fuel cell vehicle equipped with a carbon fiber reinforced plastic composite cylinder for compressed hydrogen (CFRP cylinder) and to safely scrap the burnt vehicle, it is necessary to verify whether the thermally-activated pressure relief device (TPRD) of the CFRP cylinder has already been activated, releasing the hydrogen gas from the cylinder. To develop a simple post-fire verification method on TPRD activation, the present study was conducted on the simple technique of verifying TPRD activation by measuring hydrogen concentration at the TPRD gas release port, using the hydrogen densitometers and TypeIII and TypeIV CFRP cylinders having different linings. As a result, TPRD activation status can be determined by measuring gas concentration with a catalytic combustion hydrogen densitometer at the cylinder’s TPRD gas release port within 24 hours.
